The kinetics of reaction between the potassium ions from potash feldspar and the sodium ions from solutions was firstly studied by the use of the kinetic model of ion exchange.The research showed that

potash feldspar from different locations of origin and different concentrations of potassium oxide had something similar in the experimental kinetic model of the ion exchange process.The kinetics analysis showed that at the beginning stage inner diffusion was the possible rate-determining step of the ion exchange process.With the progress of the reaction

chemical exchange gradually became the rate-determining step until equilibrium of the ion exchange process was reached.While inner diffusion became the rate-determining step;the apparent activation energy was around 38.06 kJ·mol-1. While chemical exchange became the rate-determining step

the apparent activation energy was around 129.69 kJ·mol-1.